gastrula

n. an early embryo showing differentiation of cells into the three germ layers that will give rise to all of the major tissue systems in the adult organism.

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Psychology term of the day

December 22nd 2024

sexual arousal disorder

a class of sexual disorders characterized by the inability to attain or maintain an adequate physiological response in the excitement (arousal) phase of the sexual-response cycle. See female sexual arousal disorder; male erectile disorder.